Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
theo chieu » theo tieu, ho chieu, thi chieu
dung cong » dung trong
theo chu » cho chu, chao chu, theo yeu
than cua » nhan cua, thai cua, ban cua
toan cao » toan ban, toan tap
han cua » hang cua, nhan cua, hanh cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (theo chu)) xanh - hanh ((han cua) OR (than cua)) dung cong trinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) xanh - hanh ((han cua) OR (than cua)) dung cong trinh toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) xanh - hanh ((han cua) OR (than cua)) dung cong trinh toan cao".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) xanh - hanh ((han cua) OR (than cua)) dung cong trinh toan cao*.